<template>
  <el-container class="home-container">
    <!-- 头部区域 -->
    <el-header>
      <div>
        <img src="../assets/heima.png" alt />
        <span>丞哥-电商后台管理系统</span>
      </div>
      <el-button type="info" @click="loginout">退出</el-button>
    </el-header>
    <!-- 页面主题区域 -->
    <el-container>
      <!-- 侧边栏 -->
      <el-aside :width="isCollapse ? '64px' : '200px'">
        <div class="toggle-button" @click="toggleCollapse">|||</div>
        <!-- 侧边栏菜单区 -->
        <!-- :unique-opened="true"   只保持一个子菜单的展开
        :collapse="true"  水平折叠收起菜单
        :router="true"   使用 vue-router 的模式，启用该模式会在激活导航时以 index 作为 path 进行路由跳转-->
        <el-menu
          :unique-opened="true"
          :collapse="isCollapse"
          :collapse-transition="false"
          :router="true"
          default-active="activePath"
          background-color="#333744"
          text-color="#fff"
          active-text-color="#409eff"
        >
          <!-- 一级菜单 -->
          <el-submenu :index="item.id +''" v-for="item in menuList" :key="item.id">
             <!-- 一级菜单的模板区 -->
            <!-- 一级菜单的模板区 -->
            <template slot="title">
              <!--  -->
              <i :class="iconsObj[item.id]"></i>
              <!-- 文本 -->
              <span>{{item.authName}}</span>
            </template>
            <!-- 二级菜单 -->
            <el-menu-item
              :index="'/'+subItem.path"
              v-for="subItem in item.children"
              :key="subItem.id"
              @click="savaNavState('/'+subItem.path)"
            >
              <template slot="title">
                <!--  -->
                <i class="el-icon-menu"></i>
                <!-- 文本 -->
                <span>{{subItem.authName}}</span>
              </template>
            </el-menu-item>

            <!--  二级菜单 
            <el-submenu index="1-4">
              <template slot="title">选项4</template>
              三级菜单 
              <el-menu-item index="1-4-1">选项1</el-menu-item>
            </el-submenu>-->
          </el-submenu>
        </el-menu>
      </el-aside>
      <!-- 右侧内容主体 -->
      <el-main>
        <!-- 路由占位符 -->
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
export default {
  data() {
    return {
      //左侧菜单数据
      menuList: [],
      iconsObj: {
        "125": "iconfont icon-users",
        "103": "iconfont icon-tijikongjian",
        "101": "iconfont icon-shangpin",
        "102": "iconfont icon-danju",
        "145": "iconfont icon-baobiao",
      },

      //是否折叠
      isCollapse: false,
      //被激活的链接地址
      activePath:''
    }
  },
  created() {
    this.getMenuList()
    this.activePath=window.sessionStorage.getItem('activePath')
  },
  methods: {
    loginout() {
      //点击退出后情况token
      window.sessionStorage.clear()
      //重定向到登录页面
      this.$router.push("./login")
    },
    //获取所有的菜单请求
    async getMenuList() {
      const { data: res } = await this.$http.get("menus")
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
      this.menuList = res.data
      console.log(res)
    },
    //点击按钮 切换菜单的折叠与展开
    toggleCollapse() {
      this.isCollapse = !this.isCollapse
    },
    //保存链接的激活状态 ：用户刷新页面之前点击的那个页面  刷新之后仍然在这个页面
    savaNavState(activePath) {
      window.sessionStorage.setItem("activePath", activePath)
      this.activePath=activePath
    },
  },
}
</script>

<style lang="less" scoped>
.el-header {
  background-color: #373d41;
  display: flex;
  justify-content: space-between; //左右贴边对齐
  padding-left: 0;
  align-items: center; //退出  居中
  color: #eaedf1;
  font-size: 20px;
  > div {
    display: flex;
    align-items: center;
    span {
      margin-left: 15px;
    }
  }
}
.el-aside {
  background-color: #333744;
  .el-menu {
    border-right: none;
  }
}
.el-main {
  background-color: #eaedf1;
}
.home-container {
  height: 100%;
}
.iconfont {
  padding-right: 10px;
}
.toggle-button {
  background-color: #4a5064;
  color: #eaedf1;
  font-size: 10px;
  line-height: 24px;
  text-align: center;
  letter-spacing: 0.2em;
  cursor: pointer; //点击后变为小手
}
.sy{
  color:#eaedf1
}
</style>